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A338555 as a simple table

na(n)
11
22
33
44
55
66
77
88
99
1010
1111
1212
1313
1414
1515
1616
1717
1818
1919
2020
2122
2223
2324
2425
2526
2627
2728
2829
2930
3031
3132
3233
3334
3435
3536
3637
3738
3840
3941
4042
4143
4244
4345
4446
4547
4648
4749
4850
4951
5052
5153
5254
5355
5456
5558
5659
5760
5861
5962
6064
6166
6267
6368
6469
6570
6671
6772

[1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,
 20,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,
 37,38,40,41,42,43,44,45,46,47,48,49,50,51,52,53,
 54,55,56,58,59,60,61,62,64,66,67,68,69,70,71,72]